The tender varieties, sometimes called florist's cyclamen, don't need to go dormant. They prefer cool temps and those I had enjoyed being grown in an unheated bedroom in a bright window. They would usually bloom through the winter. During summer I kept them on a shady porch. While in bloom it is tempting to move them to regular room temperature where they can be enjoyed, but they do show signs of stress within a few days. Some sources recommend cutting the blooms to enjoy in warmer areas of the home.
There are various hardy species that can be grown outdoors in the ground (C. coum, C. hederifolium, C. persicum), and I believe the genetic foundation for hybrid florist cyclamen is among that group. The hardy types do go dormant in summer.
